CN109751738B - Control method and device for multi-split air conditioner, outdoor unit and multi-split air conditioner - Google Patents
Control method and device for multi-split air conditioner, outdoor unit and multi-split air conditioner Download PDFInfo
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Abstract
The invention relates to the technical field of multi-split air conditioner control, and discloses a control method and device for a multi-split air conditioner, an outdoor unit and the multi-split air conditioner. Therefore, the temperature fluctuation of the room where the multi-split air conditioner is located meets the requirement of comfort, and the problem of comfort caused by large room temperature fluctuation due to frequent starting and stopping of the indoor unit in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of multi-split air conditioner control, in particular to a control method and device for a multi-split air conditioner, an outdoor unit and the multi-split air conditioner.
Background
In a multi-split air conditioning system, the problem of large room temperature fluctuation caused by frequent start and stop of a compressor can occur when the air conditioner is shut down when reaching the temperature, for example, in a refrigeration mode, the room temperature where the indoor unit is located when the compressor is running is reduced, the indoor unit can be triggered to shut down when reaching a set temperature, namely, an electronic expansion valve is closed, the electronic expansion valve is triggered again to open, namely, the indoor unit is started up when the room temperature rises again to be higher than the set temperature, if the capacity requirement on the air conditioner running is not changed when the air conditioner is started again, the compressor is still controlled to run according to the original capacity requirement, the room temperature is easy to drop fast and reach the set temperature again, so that the indoor unit is shut down again quickly, the room temperature rises and drops too fast, and the large room temperature fluctuation caused by the situation can influence the comfort experience of users.
Disclosure of Invention
The invention aims to provide a control method and device for a multi-split air conditioner, an outdoor unit and the multi-split air conditioner, and aims to solve the problem that the comfort experience of a user is influenced by large room temperature fluctuation caused by the fact that a compressor is stopped when reaching a temperature of the existing multi-split air conditioner.
In order to achieve the above object, the present invention provides a control method for a multi-split air conditioner, the control method comprising:
counting the number of times of reaching temperature and stopping the multi-split air conditioner within a preset time during operation, wherein the reaching temperature and stopping is to close an electronic expansion valve of an indoor unit of the multi-split air conditioner under the condition that the temperature of a room where the indoor unit is located reaches a set temperature;
correcting the running frequency of the compressor after the indoor unit is restarted according to the times of reaching the temperature and stopping, wherein the restarting of the indoor unit means that the electronic expansion valve is restarted;
and controlling the compressor to operate according to the corrected operating frequency.
Optionally, the correcting the operating frequency of the compressor after the indoor unit is restarted according to the number of times of reaching the temperature and stopping the indoor unit includes:
and correcting the operation frequency under the condition that the number of times of reaching the temperature shutdown is greater than the preset number of times.
Optionally, the correcting the operating frequency comprises:
the operating frequency is decreased by a preset frequency value.
Optionally, the method further includes, after correcting the operating frequency:
and taking the minimum value of the preset frequency as the corrected operation frequency under the condition that the corrected operation frequency is smaller than the minimum value of the preset frequency.
Optionally, the method further includes, after correcting the operating frequency:
and under the condition that the corrected running frequency is not less than the minimum value of the preset frequency, counting the number of times of reaching the temperature and stopping within the preset time again.
In order to achieve the above object, the present invention also provides a control device for a multi-split air conditioner, the control device being configured to:
counting the number of times of reaching temperature and stopping the multi-split air conditioner within a preset time during operation, wherein the reaching temperature and stopping is to close an electronic expansion valve of an indoor unit of the multi-split air conditioner under the condition that the temperature of a room where the indoor unit is located reaches a set temperature;
correcting the running frequency of the compressor after the indoor unit is restarted according to the times of reaching the temperature and stopping, wherein the restarting of the indoor unit means that the electronic expansion valve is restarted;
and controlling the compressor to operate according to the corrected operating frequency.
Optionally, the correcting the operating frequency of the compressor after the indoor unit is restarted according to the number of times of reaching the temperature and stopping the indoor unit includes:
and correcting the operation frequency under the condition that the number of times of reaching the temperature shutdown is greater than the preset number of times.
Optionally, the correcting the operating frequency comprises:
the operating frequency is decreased by a preset frequency value.
Optionally, after correcting the operating frequency, the control device is further configured to:
and taking the minimum value of the preset frequency as the corrected operation frequency under the condition that the corrected operation frequency is smaller than the minimum value of the preset frequency.
In order to achieve the above object, the present invention further provides a multi-split air conditioning outdoor unit including the control device for a multi-split air conditioner.
In order to achieve the above object, the present invention further provides a multi-split air conditioner, which includes the outdoor unit of the multi-split air conditioner.
Through the technical scheme, the control method for the multi-split air conditioner realizes that the temperature fluctuation of the room where the multi-split air conditioner is located meets the requirement of comfort, and avoids the problem of comfort caused by large room temperature fluctuation due to frequent starting and stopping of the indoor unit in the prior art.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a multi-split air conditioner block diagram of a control method for a multi-split air conditioner according to the present invention;
fig. 2 is a flowchart of a control method for a multi-split air conditioner according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The embodiment of the invention provides a control method for a multi-split air conditioner, as shown in fig. 1, the multi-split air conditioner comprises an outdoor unit 1 and a plurality of indoor units connected with the outdoor unit 1, wherein the number of the indoor units in fig. 1 is 3, the outdoor unit 1 comprises a controller 11, a compressor 12, a four-way valve 13, an external fan 14 and the like, the outdoor unit 1 is connected with the plurality of indoor units through refrigerant pipelines and control lines, each indoor unit is provided with an electronic expansion valve and an indoor unit controller, and the opening degree of the electronic expansion valve is adjusted through the indoor unit controller, so that the flow of refrigerant input into the indoor unit pipelines is adjusted. During the multi-split operation, the outdoor unit controller 11 obtains a capacity demand coefficient of each indoor unit, where the capacity demand coefficient is determined by a difference value between a room temperature T1 where the indoor unit is located and a set temperature TS, and if the room temperature T1 is higher or the set temperature TS is lower, the difference value between the room temperature T1 and the set temperature TS is larger, the capacity demand coefficient corresponding to the indoor unit in the room is larger. The outdoor unit control 11 sums the capacity demand coefficients of all the indoor units to determine a total capacity demand coefficient, and determines the current operating frequency of the compressor according to the total capacity demand coefficient, so that the output capacity of the multi-split air conditioner meets the capacity demand of the room where each indoor unit is located, and the final cooling or heating demand of each room is achieved.
As shown in fig. 2, the control method of the multi-split air conditioner based on the above includes:
step S210, counting the number of times of reaching temperature and stopping operation within a preset time when the multi-split air conditioner operates, wherein the reaching temperature and stopping operation means that an electronic expansion valve of an indoor unit of the multi-split air conditioner is closed under the condition that the temperature of a room where the indoor unit is located reaches a set temperature;
step S220, correcting the running frequency of the compressor after the indoor unit is restarted according to the times of reaching the temperature and stopping the machine, wherein the restarting of the indoor unit means that the electronic expansion valve is restarted;
and step S230, controlling the compressor to operate according to the corrected operation frequency.
In the step S210, it is worth to be noted that the opening degree of the electronic expansion valve in each indoor unit is adjusted and changed along with the start-up operation of the indoor unit, when the temperature of the room where the indoor unit is located reaches the preset temperature, the opening degree of the electronic expansion valve of the indoor unit is smaller, when the room temperature reaches the preset temperature, the opening degree of the electronic expansion valve is zero, that is, the electronic expansion valve is closed, that is, the indoor unit is closed, a refrigerant passage on a pipeline of the indoor unit is closed and is not circulated, the timing starts, when the room temperature rises to exceed the preset temperature, the electronic expansion valve is opened, that is, the indoor unit is started, so as to count the number of times of the indoor unit reaching the temperature and stopping within the preset time from the timing; at the moment, the capacity requirement of the indoor unit is reduced to zero, when the temperature of the room where all the indoor units are located reaches the set temperature, the total capacity requirement is zero, the total capacity requirement coefficient is zero, the compressor is closed, and if the temperature of the room where one indoor unit is located has the capacity requirement due to rising, the total capacity requirement coefficient is larger than zero, and the compressor is opened again.
In steps S220-S230, the running frequency of the compressor after the indoor unit is restarted is corrected according to the counted times of reaching the temperature and stopping the machine, and the compressor is controlled to operate according to the corrected operating frequency, so that when the temperature is reached and the shutdown times are relatively frequent, the operating frequency of the compressor after the indoor unit is restarted is corrected in a reducing way, so that the operating frequency of the compressor is relatively reduced, namely the total capacity output of the compressor is reduced, thereby reducing the actual cooling or heating capacity provided to each indoor unit, thus extending the time for the temperature of the room in which the indoor unit is located to reach the set temperature, the time for the indoor unit to stop again is prolonged, the up-and-down fluctuation speed of the indoor room temperature is finally delayed, and the problem of poor user experience comfort caused by large fluctuation of the room temperature due to frequent starting and stopping of the compressor in the prior art is solved.
The step of correcting the operating frequency of the compressor after the indoor unit is restarted specifically includes correcting the operating frequency of the compressor when the indoor unit is restarted and in the starting process.
It should be noted that, because the multi-split air conditioner generally has a plurality of indoor units, the above statistics on the number of times of reaching the temperature and stopping the operation of one of the indoor units before correcting the operation frequency of the compressor is performed, and the same processing is performed on the number of times of reaching the temperature and stopping the operation of other indoor units, so that the current operation frequency of the compressor can be corrected as long as the number of times of reaching the temperature and stopping the operation of each indoor unit meets the conditions of the above steps, and thus the continuous correction is performed, and the fluctuation of the temperature of the room where each indoor unit is located meets the comfort requirement of the user.
Specifically, when the operation frequency of the compressor after the indoor unit is restarted is corrected through the counted number of times of reaching the temperature shutdown, the method specifically comprises the following steps:
correcting the operation frequency under the condition that the number of times of reaching the temperature shutdown is greater than the preset number of times;
when the number of times of reaching the temperature and stopping the indoor unit counted in the preset time exceeds the preset value, if the number of times of reaching the temperature and stopping the indoor unit counted in 1 hour exceeds 10 times, the number of times of starting and stopping the indoor unit is considered to be overlarge, so that the fluctuation of the room temperature is high, and therefore the operation frequency needs to be corrected. The preset times can be determined according to the temperature fluctuation condition during the previous experiment so as to influence the comfort of the user.
Further, the step of correcting the operating frequency specifically includes:
the operating frequency is reduced by a preset frequency.
And reducing the current running frequency F0 of the compressor by a preset frequency W to be used as the running frequency of the compressor when the indoor unit is started next time. The value of the preset frequency W can be determined through early-stage experiments, and is particularly related to the number of times of reaching the temperature and stopping, when the number of times of reaching the temperature and stopping is larger, the preset frequency W is larger, so that the correction amplitude of the operating frequency is larger, and the operating frequency needs to be reduced relatively greatly because the temperature fluctuation is relatively high at the moment.
Further, after the operating frequency is corrected, the method further comprises the following steps:
and taking the minimum value of the preset frequency as the corrected operation frequency under the condition that the corrected operation frequency is smaller than the minimum value of the preset frequency.
In order to avoid overlarge correction amplitude of the operating frequency, a preset minimum value of the operating frequency is set, and if the corrected operating frequency is smaller than the minimum value, the minimum value is used as the corrected operating frequency. Since the corrected operating frequency is already at the preset frequency minimum value, the operating frequency of the compressor is not corrected any more, and the compressor is always operated according to the preset frequency minimum value.
Further, after the operating frequency is corrected, the method further comprises the following steps:
and under the condition that the corrected running frequency is not less than the minimum value of the preset frequency, counting the number of times of reaching the temperature and stopping within the preset time again. And resetting the counted number of the temperature reaching shutdown, and restarting the counting of the number of the temperature reaching shutdown within the preset time.
The control method for the multi-split air conditioner comprises the steps of counting the number of times of reaching temperature and stopping the multi-split air conditioner within a preset time when the multi-split air conditioner operates, wherein the reaching temperature and stopping is that an electronic expansion valve of an indoor unit of the multi-split air conditioner is closed under the condition that the temperature of a room where the indoor unit is located reaches a set temperature, then correcting the operation frequency of a compressor after the indoor unit is restarted according to the number of times of reaching temperature and stopping, wherein the step of restarting the indoor unit means that the electronic expansion valve is restarted, and finally controlling the compressor to operate according to the corrected operation frequency. Therefore, the temperature fluctuation of the room where the multi-split air conditioner is located meets the requirement of comfort, and the problem of comfort caused by large room temperature fluctuation due to frequent starting and stopping of the indoor unit in the prior art is solved.
An embodiment of the present invention also provides a control device for a multi-split air conditioner, the control device being provided in an outdoor unit of the multi-split air conditioner, the multi-split air conditioner being the same as the multi-split air conditioner described in the above-mentioned control method embodiment for the multi-split air conditioner, the control device being configured to:
counting the number of times of reaching temperature and stopping the multi-split air conditioner within a preset time during operation, wherein the reaching temperature and stopping is to close an electronic expansion valve of an indoor unit of the multi-split air conditioner under the condition that the temperature of a room where the indoor unit is located reaches a set temperature;
correcting the running frequency of the compressor after the indoor unit is restarted according to the times of reaching the temperature and stopping, wherein the restarting of the indoor unit means that the electronic expansion valve is restarted;
and controlling the compressor to operate according to the corrected operating frequency.
In the above configuration step, it is worth to be noted that the opening degree of the electronic expansion valve in each indoor unit is adjusted and changed along with the start-up operation of the indoor unit, when the temperature of the room where the indoor unit is located reaches the preset temperature, the opening degree of the electronic expansion valve of the indoor unit is smaller, when the room temperature reaches the preset temperature, the opening degree of the electronic expansion valve is zero, namely the electronic expansion valve is closed, namely the indoor unit is closed, a refrigerant passage on a pipeline of the indoor unit is closed and is not circulated, the timing is started, when the room temperature rises to exceed the preset temperature, the electronic expansion valve is opened, namely the indoor unit is started, so as to count the number of times of the indoor unit reaching the temperature and stopping within the preset time from the timing; at the moment, the capacity requirement of the indoor unit is reduced to zero, when the temperature of the room where all the indoor units are located reaches the set temperature, the total capacity requirement is zero, the total capacity requirement coefficient is zero, the compressor is closed, and if the temperature of the room where one indoor unit is located has the capacity requirement due to rising, the total capacity requirement coefficient is larger than zero, and the compressor is opened again.
Correcting the running frequency of the compressor after the indoor unit is started up again through the counted up-to-temperature shutdown times, and the compressor is controlled to operate according to the corrected operating frequency, so that when the temperature is reached and the shutdown times are relatively frequent, the operating frequency of the compressor when the indoor unit is restarted is corrected in a decreasing manner, so that the operating frequency of the compressor is relatively decreased, namely the total capacity output of the compressor is decreased, thereby reducing the actual cooling or heating capacity provided to each indoor unit, thus extending the time for the temperature of the room in which the indoor unit is located to reach the set temperature, the time for the indoor unit to stop again is prolonged, the up-and-down fluctuation speed of the indoor room temperature is finally delayed, and the problem of poor user experience comfort caused by large fluctuation of the room temperature due to frequent starting and stopping of the compressor in the prior art is solved.
The step of correcting the operating frequency of the compressor after the indoor unit is restarted specifically includes correcting the operating frequency of the compressor when the indoor unit is restarted and in the next starting process.
It should be noted that, because the multi-split air conditioner generally has a plurality of indoor units, the above statistics on the number of times of reaching the temperature and stopping the operation of one of the indoor units before correcting the operation frequency of the compressor is performed, and the same processing is performed on the number of times of reaching the temperature and stopping the operation of other indoor units, so that the current operation frequency of the compressor can be corrected as long as the number of times of reaching the temperature and stopping the operation of each indoor unit meets the conditions of the above steps, and thus the continuous correction is performed, and the fluctuation of the temperature of the room where each indoor unit is located meets the comfort requirement of the user.
Specifically, when the operation frequency of the compressor after the indoor unit is restarted is corrected through the counted number of times of reaching the temperature shutdown, the method specifically comprises the following steps:
correcting the operation frequency under the condition that the number of times of reaching the temperature shutdown is greater than the preset number of times;
when the number of times of reaching the temperature and stopping the indoor unit counted in the preset time exceeds the preset value, if the number of times of reaching the temperature and stopping the indoor unit counted in 1 hour exceeds 10 times, the number of times of starting and stopping the indoor unit is considered to be overlarge, so that the fluctuation of the room temperature is high, and therefore the operation frequency needs to be corrected. The preset times can be determined according to the temperature fluctuation condition during the previous experiment so as to influence the comfort of the user.
Further, the step of correcting the operating frequency specifically includes:
the operating frequency is reduced by a preset frequency.
And reducing the current running frequency F0 of the compressor by a preset frequency W to be used as the running frequency of the compressor when the indoor unit is started next time. The value of the preset frequency W can be determined through early-stage experiments, and is particularly related to the number of times of reaching the temperature and stopping, when the number of times of reaching the temperature and stopping is larger, the preset frequency W is larger, so that the correction amplitude of the operating frequency is larger, and the operating frequency needs to be reduced relatively greatly because the temperature fluctuation is relatively high at the moment.
Further, after the operating frequency is corrected, the method further comprises the following steps:
and taking the minimum value of the preset frequency as the corrected operation frequency under the condition that the corrected operation frequency is smaller than the minimum value of the preset frequency.
In order to avoid overlarge correction amplitude of the operating frequency, a preset minimum value of the operating frequency is set, and if the corrected operating frequency is smaller than the minimum value, the minimum value is used as the corrected operating frequency.
The control device for the multi-split air conditioner comprises a temperature-reaching shutdown device, a temperature-reaching shutdown device and a control device, wherein the temperature-reaching shutdown device is used for closing an electronic expansion valve of an indoor unit of the multi-split air conditioner when the temperature of a room where the indoor unit is located reaches a set temperature, then correcting the operation frequency of a compressor after the indoor unit is restarted according to the temperature-reaching shutdown frequency, the restarting of the indoor unit means that the electronic expansion valve is restarted, and finally controlling the compressor to operate according to the corrected operation frequency. Therefore, the temperature fluctuation of the room where the multi-split air conditioner is located meets the requirement of comfort, and the problem of comfort caused by large room temperature fluctuation due to frequent starting and stopping of the indoor unit in the prior art is solved.
The embodiment of the invention also provides a multi-split air conditioner outdoor unit, which comprises the control device for the multi-split air conditioner.
An embodiment of the present invention further provides a multi-split air conditioner, as shown in fig. 1, the multi-split air conditioner includes a plurality of indoor units and the multi-split air conditioner outdoor unit of the embodiment.
Embodiments of the present invention also provide a computer program product, which includes program instructions, and when the program instructions are executed by a controller, the controller can implement the control method for the multi-split air conditioner described in any of the above embodiments.
Embodiments of the present invention also provide a storage medium having computer-readable instructions stored thereon, which, when executed by a controller, enable the controller to perform the control method for a multi-split air conditioner in the above-described embodiments.
Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program to instruct related hardware, where the program is stored in a storage medium and includes several instructions to enable a (may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description herein, references to the description of the terms "first embodiment," "second embodiment," "example," etc., mean that a particular method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, methods, apparatuses, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. A control method for a multi-split air conditioner, wherein the multi-split air conditioner comprises a plurality of indoor units, the control method comprising:
counting the number of times of reaching-temperature shutdown of each indoor unit within a preset time when the multi-split air conditioner is in operation, wherein the reaching-temperature shutdown is to close an electronic expansion valve of the indoor unit when the temperature of a room where the indoor unit of the multi-split air conditioner is located reaches a set temperature;
correcting the running frequency of the compressor after the indoor unit is restarted according to the temperature reaching shutdown times, wherein the restarting of the indoor unit means that the electronic expansion valve is opened again;
controlling the compressor to operate according to the corrected operating frequency;
the correcting the running frequency of the compressor after the indoor unit is restarted comprises correcting the running frequency of the compressor when the indoor unit is restarted and in the starting process.
2. The control method according to claim 1, wherein the correcting the operating frequency of the compressor after the indoor unit is restarted according to the number of times of reaching the temperature and stopping the indoor unit comprises:
and correcting the operating frequency under the condition that the number of times of the temperature-reaching shutdown is greater than the preset number of times.
3. The control method of claim 1, wherein said modifying said operating frequency comprises:
reducing the operating frequency by a preset frequency value.
4. The control method of claim 3, wherein said modifying said operating frequency further comprises:
and taking the minimum value of the preset frequency as the corrected operation frequency under the condition that the corrected operation frequency is smaller than the minimum value of the preset frequency.
5. The control method of claim 3, wherein said modifying said operating frequency further comprises:
and under the condition that the corrected running frequency is not less than the minimum value of the preset frequency, counting the times of reaching the temperature and stopping within the preset time again.
6. A control device for a multi-split air conditioner, the control device being configured to:
counting the number of times of reaching-temperature shutdown of each indoor unit within a preset time when the multi-split air conditioner is in operation, wherein the reaching-temperature shutdown is to close an electronic expansion valve of the indoor unit when the temperature of a room where the indoor unit of the multi-split air conditioner is located reaches a set temperature;
correcting the running frequency of the compressor after the indoor unit is restarted according to the temperature reaching shutdown times, wherein the restarting of the indoor unit means that the electronic expansion valve is opened again;
controlling the compressor to operate according to the corrected operating frequency;
the correcting the running frequency of the compressor after the indoor unit is restarted comprises correcting the running frequency of the compressor when the indoor unit is restarted and in the starting process.
7. The control device according to claim 6, wherein the correcting the operating frequency of the compressor after the indoor unit is restarted according to the number of times of reaching the temperature and stopping the indoor unit comprises:
and correcting the operating frequency under the condition that the number of times of the temperature-reaching shutdown is greater than the preset number of times.
8. The control device of claim 6, wherein said modifying said operating frequency comprises:
reducing the operating frequency by a preset frequency value.
9. The control device of claim 8, wherein after the operating frequency is modified, the control device is further configured to:
and taking the minimum value of the preset frequency as the corrected operation frequency under the condition that the corrected operation frequency is smaller than the minimum value of the preset frequency.
10. An outdoor unit of a multi-split air conditioner, comprising the control device as set forth in any one of claims 6 to 9.
11. A multi-split air conditioner comprising a plurality of indoor units and the outdoor unit of the multi-split air conditioner as set forth in claim 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811519218.2A CN109751738B (en) | 2018-12-12 | 2018-12-12 | Control method and device for multi-split air conditioner, outdoor unit and multi-split air conditioner |
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| CN201811519218.2A CN109751738B (en) | 2018-12-12 | 2018-12-12 | Control method and device for multi-split air conditioner, outdoor unit and multi-split air conditioner |
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| CN110260498B (en) * | 2019-06-24 | 2020-08-04 | 珠海格力电器股份有限公司 | Compressor frequency adjusting method and device and air conditioning system |
| CN110285551B (en) * | 2019-06-28 | 2021-05-25 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and electronic equipment |
| CN111780372B (en) * | 2020-07-09 | 2021-11-23 | 青岛海尔空调器有限总公司 | Control method of one-driving-multiple air conditioner |
| CN112539513B (en) * | 2020-12-14 | 2022-07-29 | 珠海格力电器股份有限公司 | Method for detecting automatic start-up and shut-down faults of multi-connected unit |
| CN113251590A (en) * | 2021-05-13 | 2021-08-13 | 海信（山东）空调有限公司 | Control method and device of air conditioner, air conditioner and computer readable storage medium |
| CN113531857B (en) * | 2021-07-20 | 2022-09-20 | 广东美的制冷设备有限公司 | Control method of multi-split air conditioner, multi-split air conditioner and storage medium |
| CN113719965B (en) * | 2021-08-16 | 2022-09-27 | 宁波奥克斯电气股份有限公司 | Frequency control method and device of compressor and variable frequency air conditioner |
| CN114234383B (en) * | 2021-12-21 | 2023-08-08 | 北京小米移动软件有限公司 | Air conditioner control method and device |
| CN114183889B (en) * | 2021-12-23 | 2023-07-28 | 邵阳学院 | Control method and control device of air conditioner and air conditioner |
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